I carry 2, prevviously 3. I carry a Gerber paraframe that I found open under the seat of an old jeep I bought and found I liked it better than others I have spent money on and a victorinox classic sd swiss army, actually 2 sd's because there is one on my keychain too. I used to carry a case too but it fell out of my pants when I wore a suit one day. Not sure why I carry so many but it is a habit.

At work, I've been carrying a Parker Cutlery On the weekend, I carry a Buck Bucklite that I got when I went to work at Bass Pro Shops in 1986.
I've got about 2 dozen knives, folders and fixed blades. I used to check out the knife section of gun shops and especially pawn shops, for gun company knives. I haven't been doing that as much lately, everything I see is Chinese made now.

They are wonderful knives. Durable, hold an edge well, and the paraframes are weatherproof. I found mine in an old deer blind back in 2009. looked like it had been there for at least a year when I found it. I figure the person that left it got it for christmas and stuck it in the cieling of that ol hunting blind during the last hunt of the season and forgotten about it. Its been serving me ever since.

I carry cheap knifes as they get tore up. I have a case XX from my dad, he carried during WWII, heavy knife, weights about the same as a pistol. The heel can be used as a hammer if need be. I use that when I'm camping.